Fantasymon
Well-Known Member
- Joined
- June 29, 2001
- Messages
- 392
- Reaction score
- 0
- City, State
- Tulsa, OK
- Year, Model & Trim Level
- 2000 XLS
I have the following two codes:
P0171 System too Lean (Bank 1)
P0174 System too Lean (Bank 2)
I have searched on here a lot but I think my situation is a little unique. I have the KKM air filter, BBK throttle body, and then BBK headers. I had some maintenance guys replace my head gaskets and a bunch of other stuff including installing the headers.
I now get the two codes. They changed all of my 02 sensors. When I took it back to them they said that it is because the headers allow so much extra air through the exhaust that it is causing the system to run lean and make the codes to trigger. They said the only way to fix it would be to buy some expensive high performance 02 sensors. They said that I should just ignore it. (I bought all of the parts myself so its not like they were trying to sell me some expensive parts).
I do trust their knowledge for the most part but I still don't like the idea of the check engine light being on due to the system being too lean.
Should I take their advice and just ignore it? I have also done a performance tune several years ago from the guy on here (forgot his name).
P0171 System too Lean (Bank 1)
P0174 System too Lean (Bank 2)
I have searched on here a lot but I think my situation is a little unique. I have the KKM air filter, BBK throttle body, and then BBK headers. I had some maintenance guys replace my head gaskets and a bunch of other stuff including installing the headers.
I now get the two codes. They changed all of my 02 sensors. When I took it back to them they said that it is because the headers allow so much extra air through the exhaust that it is causing the system to run lean and make the codes to trigger. They said the only way to fix it would be to buy some expensive high performance 02 sensors. They said that I should just ignore it. (I bought all of the parts myself so its not like they were trying to sell me some expensive parts).
I do trust their knowledge for the most part but I still don't like the idea of the check engine light being on due to the system being too lean.
Should I take their advice and just ignore it? I have also done a performance tune several years ago from the guy on here (forgot his name).